Convenient parameter estimation approaches for process control systems with time-delay via step responses

This paper focuses on the problem of the parameter estimation for the control systems with a time-delay. Many control systems can be expressed by a first-order system with a time-delay, which is used widely in process control for its good characteristic of describing the dynamical systems. In this work, an easy method for estimating the parameters of the first-order system with time-delay is presented based on the observed data from the discrete-time sampling. By picking up some datum points and having some convenient operations, the convenient parameter estimation methods, i.e., the one-point method and the two-point method are developed for the time-delay systems. The numerical simulation is carried out to test the performance of the proposed approaches.

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